So if you spend $100 on your card, you get 1 reward "point", which in reality is $1. Spending $500 will earn you $5, etc.

You can redeem points towards WDW stays. Once you earn at least $10 in reward points, you can call or use the website to order a card. It basically functions like a debit card. You load the points you've earned onto the card, and can use it for pretty much anything in WDW, including resort stays.

Also, if you book a WDW vacation package on your Disney Visa card (not room-only), you won't pay interest on it for 6 months. So basically you get an extra 6 months to pay off the vacation without accruing interest.